Nsryjdtyk

My program is about contacts.
When a Doctor for an example insert name,surname,telephone, everytime he wants to save the data into txt file then output will be:

somename

somesurname

sometelephone



somename

somesurname

sometelephone

...

Right now i did the output will be only in one line:
somename somesurname sometelephone as you can see at the code:

if(text.equals("Save")) {               

    try {       

        ArrayList<String> contactsinformations=new ArrayList<>();

        String name=tname.getText();

        String surname=tsurname.getText();

        String telephone=ttelephone.getText();

        contactsinformations.add(0,name+" ");

        contactsinformations.add(1,surname+" ");

        contactsinformations.add(2,telephone+" ");  



        FileWriter outFile = new FileWriter("Contacts.txt");

        BufferedWriter outStream = new BufferedWriter(outFile);                   

        for(int i=0; i<contactsinformations.size(); i++)

            outStream.write(String.valueOf(contactsinformations.get(i)));                

        outStream.close();

        JOptionPane.showMessageDialog(this,"Data saved.");  



    } catch(IOException e) {

        System.out.println("ERROR IN FILE");

    }

}

I use for loop to get the size of the ArrayList but trying to figure out how can I insert the informations in different line.

WARNING: UPDATED QUESTION!
Question solved with just a true!

if(text.equals("Save")) {               

                try

                {       



                    ArrayList<String> contactsinformations=new ArrayList<>();               

                    contactsinformations.add(tname.getText());

                    contactsinformations.add(tsurname.getText());

                    contactsinformations.add(ttelephone.getText());                 

                    FileWriter outFile = new FileWriter("Contacts.txt",true);

                    BufferedWriter outStream = new BufferedWriter(outFile);                   

                    for (int i = 0; i < contactsinformations.size(); i++) {

                        outStream.write(contactsinformations.get(i));   

                        outStream.newLine();

                    }

                    JOptionPane.showMessageDialog(this,"Data saved.");  

                    outStream.close();

                 }

Use :

outStream.write(contactsinformations.get(i) + "n");

Here n signifies the new line.

1. 
   

   As ArrayList preserves insertion order you don't need to precise the index and you can omit the useless variables name, surname, telephone :

   
   
   

   contactsinformations.add(tname.getText());
   
   contactsinformations.add(tsurname.getText());
   
   contactsinformations.add(ttelephone.getText());
   
   

   
   


2. 
   

   As the type of the ArrayList is String you don't need the valueOf method :

   
   
   

   for (int i = 0; i < contactsinformations.size(); i++) {
   
       outStream.write(contactsinformations.get(i));
   
       outStream.newLine();
   
   }
   
   

   
   


3. 
   

   The PrintWriter class has a method to do both in one call (combine with for-each loop here) :

   
   
   

   PrintWriter pw = new PrintWriter(outFile);
   
   for (String contactsinformation : contactsinformations) {
   
       pw.println(contactsinformation);
   
   }
   
   

   
   

Convert to CharArray and the write BufferedWriter :

for(int i=0; i< contactsinformations.size(); i++) {

    String str = contactsinformations.get(i) + "n";

    outStream.write(str.toCharArray(), 0, str.length()); 

}

or write the String by using offset and length the same way as above:

for(int i=0; i< contactsinformations.size(); i++) {

    String str = contactsinformations.get(i) + "n";

    outStream.write(str, 0, str.length()); 

}

outStream.write(contactsinformations.stream()

         .collect(Collectors.joining(System.lineSeparator())));